<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title>gird</title>
		<link href="css/4-2-1.css" rel="stylesheet"/>
	</head>
	<body>
		<div id="container">
			<div class="box firstGrid">box content 1</div>
			<div class="box secondGrid">box content 2</div>
			<div class="box">box content 3</div>
			<div class="box">box content 4</div>
			<div class="box">box content 5</div>
			<div class="box">box content 6</div>
			<div class="box">box content 7</div>
			<div class="box">box content 8</div>
			<div class="box">box content 9</div>
		</div>
	</body>
</html>